All great suggestions above. In Florida hit some of the springs, Georgia, Savannah and up around Blairsville. Then over to Asheville and maybe Maggie Valley and Cherokee. Head up the Blue Ridge. Stop at Gettysburg. Maybe look at Letchworth State Park in NY and then over to Watkins Glen and the Finger Lakes. Over to Lake George/Adirondacks then potentially Boston/Cape Code and then up to Bar Harbor Maine. We do this , or similar trip/stops most every summer.
You didn't mention what kind if coach you had, but if it's on a Freightliner chassis, stop at Gaffney before you go to Asheville for your annual service if you need it. Great work and reasonable price.